CN203035213U - Expansion type anchor rod - Google Patents
Expansion type anchor rod Download PDFInfo
- Publication number
- CN203035213U CN203035213U CN 201220606038 CN201220606038U CN203035213U CN 203035213 U CN203035213 U CN 203035213U CN 201220606038 CN201220606038 CN 201220606038 CN 201220606038 U CN201220606038 U CN 201220606038U CN 203035213 U CN203035213 U CN 203035213U
- Authority
- CN
- China
- Prior art keywords
- rod
- expansion type
- blocking board
- baffle plate
- anchor rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides an expansion type anchor rod which comprises a rod body, a blocking board is arranged at the front end of the rod body, nuts and a backing plate are arranged at the rear end of the rod body, the nuts are connected with the rod body through the backing plate, a plastic sleeve tube, a protrusion portion and a steel tendon are sequentially arranged at the front end of the blocking board, the plastic sleeve tube, the steel tendon and the protrusion portion are sequentially connected, the plastic sleeve tube is matched with threads on the rod body to be connected on the rod body and is closely connected with the blocking board; a clamping groove is formed in the periphery of the blocking board, the clamping groove, the blocking board and the rod body are integrated, and protecting oil is coated on the steel tendon. Due to the fact that the polytene plastic sleeve tube and the protrusion portion are arranged at the front end of the blocking board, when the expansion type anchor rod is pressurized, the protrusion portion expands rapidly to squeeze the steel wire of the protrusion portion into a rock body, increases friction between the anchor rod and the rock body around the anchor rod, improve bond stress of the rock body around the anchor body to the anchor body and enable the anchoring performance of the anchor rod to be more obvious, and the expansion type anchor rod is better in breaking effect of rocks particularly.
Description
Technical field
The utility model relates to a kind of anchor pole, especially a kind of expansion type roof bolt for cracked rock stratum.
Background technology
Common anchor structure is that anchor bar body is linked to each other with anchor head at present, makes anchor head be embedded in the hard rock, utilizes bond stress and the friction of lithosome and anchor head, satisfies the anchored force of anchor pole, plays the effect of anchoring.But this anchoring can not provide effective anchored force for cracked lithosome, often occurs the phenomenon that " connecting rod band anchor " is pulled out together when the application of reality.
The utility model content
In order to solve the problem that above-mentioned prior art exists, the utility model provides a kind of expandable anchor pole technology, makes anchor pole possess sufficient anchoring ability in cracked rock stratum, further reduces the phenomenon that anchor pole is pulled out.
A kind of expansion type roof bolt, comprise the body of rod, the front end of the body of rod is provided with baffle plate, the rear end is provided with nut, backing plate, nut links to each other with the body of rod by backing plate, the front end of baffle plate is provided with plastic bushing, jut and steel tendon successively, and plastic bushing, jut and steel tendon are connected successively, and plastic bushing cooperatively interacts to be connected on the body of rod and with baffle plate with screw thread on the body of rod and closely links to each other; The outer periphery of baffle plate is equipped with draw-in groove, and draw-in groove, baffle plate and the body of rod are one.
Preferably, above-mentioned plastic bushing is the vinyon sleeve pipe.
Preferably, scribble one deck protection grease on the above-mentioned steel tendon.
Preferably, above-mentioned protection grease is anticorrosion building grease.
Because the front end increase at baffle plate has vinyon sleeve pipe and jut, jut expands rapidly when pressurized, steel wire in its structure is clamp-oned in the lithosome, anchor pole and the friction of lithosome have on every side been increased, lithosome is to the bond stress of anchor pole around improving, make the anchoring property of anchor pole more obvious, particularly effect is better in fractured rock.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail:
Fig. 1 is structural representation of the present utility model.
Fig. 2 is 1 partial structurtes figure schematic diagram.
Fig. 3 is 2 schematic cross-section.
The specific embodiment
A kind of expansion type roof bolt comprises the body of rod 4, and the front end of this body of rod 4 is provided with baffle plate 6, and the rear end is provided with nut 1, backing plate 2, and nut 1 links to each other with the body of rod 4 by backing plate 2, makes that the anchor pole outside is more fixing; Front end at baffle plate 6 is connected with plastic bushing 8 in turn, jut 9 is a jut of plastic bushing 8, plastic bushing 8, jut 9 and steel tendon 10 are connected successively, jut steel wire when being under pressure can strut, when steel tendon is not easy to be strutted, can apply the power opposite with the steel tendon direction of rotation and pressure acting in conjunction in jut, make steel tendon strut easily, and then steel wire is inserted in broken the lithosome, make that anchor pole and fractured rock and soft layer frictional force are bigger, also make on every side lithosome or the soil body bigger to the bond stress of anchor pole.Plastic bushing 8 cooperatively interacts to be connected on the body of rod 4 and with baffle plate 6 with screw thread on the body of rod 4 and closely links to each other; The outer periphery of baffle plate 6 is equipped with draw-in groove 5, and draw-in groove 5, baffle plate 6 and the body of rod 4 are one.The periphery of baffle plate arranges draw-in groove, when the steel tendon steel wire diameter excessive, when being not easy to be strutted, assisting special steel pipe to block when the draw-in groove direction opposite with steel tendon steel wire direction of rotation is rotated exerts pressure, making steel tendon effectively strut in the convenient construction process exerts pressure to anchor pole, above-mentioned special steel pipe is front opening in the prior art, can block the steel pipe of draw-in groove.
Sleeve pipe 8 is the vinyon sleeve pipe, expands rapidly when being squeezed, and increases and the frictional force of lithosome on every side, increases the integral fastening power of anchor pole.
Scribble one deck protection grease on the steel tendon 10, this grease is anticorrosion building grease, by anticorrosion grease prestress wire is protected.
Need to prove that also under the instruction of this manual, any equivalents or obvious variant that those skilled in the art make the utility model all should be in protection domains of the present utility model.
Claims (4)
1. expansion type roof bolt, comprise the body of rod, the front end of the described body of rod is provided with baffle plate, the rear end is provided with nut, backing plate, described nut links to each other with the body of rod by backing plate, it is characterized in that: the front end of described baffle plate is provided with plastic bushing, jut and steel tendon successively, and described plastic bushing, jut and steel tendon are connected successively, and described plastic bushing cooperatively interacts to be connected on the body of rod and with baffle plate with screw thread on the body of rod and closely links to each other; The outer periphery of described baffle plate is equipped with draw-in groove, and described draw-in groove, baffle plate and the body of rod are one.
2. a kind of expansion type roof bolt according to claim 1, it is characterized in that: described plastic bushing is the vinyon sleeve pipe.
3. a kind of expansion type roof bolt according to claim 1 and 2 is characterized in that: scribble one deck protection grease on the described steel tendon.
4. a kind of expansion type roof bolt according to claim 3, it is characterized in that: described protection grease is anticorrosion building grease.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220606038 CN203035213U (en) | 2012-11-16 | 2012-11-16 | Expansion type anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220606038 CN203035213U (en) | 2012-11-16 | 2012-11-16 | Expansion type anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203035213U true CN203035213U (en) | 2013-07-03 |
Family
ID=48687346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220606038 Expired - Fee Related CN203035213U (en) | 2012-11-16 | 2012-11-16 | Expansion type anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203035213U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT514992A1 (en) * | 2013-10-18 | 2015-05-15 | Porr Bau Gmbh | Prestressing anchor |
| CN108915731A (en) * | 2018-08-20 | 2018-11-30 | 中国矿业大学 | It is a kind of for constructing the flexible steel tow and method for protecting support of back thick-layer rock beam |
| CN112879058A (en) * | 2021-01-21 | 2021-06-01 | 北京科技大学 | Radial internal expansion resistance-increasing anchor rod cable supporting device and method |
-
2012
- 2012-11-16 CN CN 201220606038 patent/CN203035213U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT514992A1 (en) * | 2013-10-18 | 2015-05-15 | Porr Bau Gmbh | Prestressing anchor |
| AT514992B1 (en) * | 2013-10-18 | 2015-07-15 | Porr Bau Gmbh | Prestressing anchor |
| CN108915731A (en) * | 2018-08-20 | 2018-11-30 | 中国矿业大学 | It is a kind of for constructing the flexible steel tow and method for protecting support of back thick-layer rock beam |
| CN112879058A (en) * | 2021-01-21 | 2021-06-01 | 北京科技大学 | Radial internal expansion resistance-increasing anchor rod cable supporting device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20141116 |
|
| EXPY | Termination of patent right or utility model |